Rotary loop taker for sewing machines



0a. 26, 1943. C E. CQLEGRQVE 2,332,964

ROTARY LOOP TAKER FOR SEWING MACHINES Filed May 15, 1941 2 Sheets-Sheetl INVENTOR. BY 65 494544," (0456 9014;

WFIW

ATTORNEYfi Oct. 26,1943. c. E. COLEGROVE ROTARY LOOP TAKER FOR SEWINGMACHINES Filed May 15, 1941 2 Sheets-Sheet 2 Z0 i ival I N VE N TOR.67/424 5 E. (04:62am BY ATTORNEY5 result even in temporar Patented Oct.26, 1943 UNTITEDSTVATE s PATENT OFFICE itdTARY Ll :lf:7:tF0lt i IMACHINES Charles ErColegrove Lakewood, Ohio, assignor to White SewingMachine Corporation, Cleveland,

Ohio, a corporation of Delaware Application May 15, 1941, s 1 i 1 o393,572

28 Claims. (01. 112-228) i y This invention relates; to a loop taker fora sewing machine has, ijor examplea lock stitchsewing machine.f*Theinvention relates more particularly to a loop taker of'the type known asarotaryfloop taker or revolving hook loop taker. As iswell known in theart, loop takersoff the ,rotarybr revolving hook type include arotatable p ha ll 'pd wh ch a oo s z b a :for manipulating the loop in:thetupper-or needle thread. A bobbin case carrieris mounted with- "inthecup-shapedbody but new against rotation therewith qrthereln and receivesthebobbin which carries he thread. In this connection it willbe under tood that suitable means usually carried bythe bed plate of the sewingmachine "cooperates with a portiojn of the bobbin casecarrier .to holdthe flatter against rotation while the body rotates relative thereto.The bobbin is mounted in a bobbin case 'supported"in the bobbin oasecarrier against rotation relative thereto.

loo'p s eiz ing beak of thef'rotatable body enfterstheloop irrthe upperor needle thread and carries one side or said loop in front of therim'of the body while taking the other side of said loop to therear of thebobbin case carrier.

'1 The rotatable body i provided with'a circular raceway for aperipheral bearingrib on thenon- "rotatable bobbin case carrier; j The,body usually has alportion cut awayftofl iorm the loop seiz- "izi'g'beakand to provide also an opening for the upper or needle loop thread topermit the pas- "sagepfthatside ofthe loop'whioh is carried to therearside of the bobbin'case' carrier." The bobbin case carrier has a portionof its periphery cut away to provide a similar opening, wherefore theraceway in the bodyandthe bearing rib on "the bobbincase ca1rrier' arefnot' continuous throughout their circumferences.

.In other words, the constructionprovides gaps rin the cooperatingbearing surfaces of the rib andraceway and: these gaps can-cause what isknown in the art as clogging. This clogging may .cause' seriousdifficulty inthe efiici'ent operation of a sewingmachine of this typeand can Clogging will not occur' iflthe upper or needle ily stopping theopera .tionof the machine. i 1 l lor loose threads may be'pickedup bythe loop seizing beak ,or hook and be drawn between the raceway in thebody and the peripheral bearing rib on the bobbin case carrier. 1 Undersuch circumstances it frequently happens that the thread which isimproperly drawn into the raceway becomes so tightlywedged therein as toprevent the free and eflicient operation of the loop taker or even to;completely stop its operation. When such an occurrence takes place it isnecessary usually to take the loop taker apart so that the wedged threadcanbe removedfrom therace- Way. This is a serious disadvantage as takingthe loop taker apart is a fairly complicated manipulation which theusual operator is notcompetent to perform, particularly as suchoperatorordinarily his not equipped with the proper too-ls forthispurpose. g

An object of the inventionis to provide a construction ,for a sewingmachine loop taker of the typeuspecifi ed and whichis so designed thatthe loop takercan be maintained in proper working conditionreadily andconveniently by any operator. a p

Another object of the invention is to provide a loop taker such asspecifiedin the lastnamed object and wherein, the proper maintenance ofthesarnecan be obtained without disassembling the loop taker mechanism.l

A still further object is'to provide a loop taker ,mechanism which issolconstructed that should any thread become wedged between the racewayin the rotatable body and the bearing rib on the bobbincase carrier suchthread can be readily and lquiclgly removed by the operator withoutdisassembling the loop taker mechanism. I

Another object of the invention is to provide in connection with a looptaker mechanism, a power operated arrangement enabling the loop taker tobe maintained readily and easily in prop er operating condition; andfree of clogging.

Further and additional objects and advantages not hereinbefore specifiedwill subsequently become apparent during the detailed description whichis to follow of several embodiments of the invention. l l i l Thepresent invention-contemplates attaining the objects above specified andthe-objects and advantages later to become apparent by providing in theloop taker means'for enlarging or expanding ina transverse direction theraceway in the rotatable bodyandthus providing substantial clearancebetween the raceway and the peripheral rib on the bobbin case carrier,wherefore when the loop taker is rotated any thread which latterparts-are in assembled relationship. H 2' ,The bobbin case carrier .25,ibobbinwoase 29 and the bobbin; areiheldragainst rotation with the bodyby-means 0f a1keeper3 i carried by: the bed plate oftheisewing-maohineand engaging in, a

notch? 32 formedhinkanupstanding portion 33, at

the outerend of theibobbin case carrier 25, as I lisjusual in looptakers of thistype.

i n In: order toteffect theaexparisionf'and.contraction or the racewaythe vfollowing:arrangement is employed. (The: disk; l' I rof theubody ispro- :vided witha pluralityof ciroumferentially spaced i -openingspreferably, arranged concentrically to the axis of the disk "whilea:plurality of pins are slidable in: theseE-openings with their left handends, as viewedin thexdrawin'gs, contacting the bottom ofthe-.cu'p-shaped member 2|. The right handends; of the pins 34' areengaged by a nut 35 screwed Ion theythreaded portion 15 of the .hubrl2.A fspring pressed, balldetent 36 is carried by the nut 35am retainsthelatter *i-niadjusted position upon the "hubl2. 1

- eWhen thennut 35 is screwed to its mostleft yhand position, as viewedin 3, it pushes;the :pins 34againstthe cup-shaped member 2| and 'movesthe latter-toward the left, as viewed in thedrawings, until the rib 23on said member engages the internallx sh0ulder 22 not the ring 41.Atflthis time the taperedouter or openrend :"0f the memberZIQispositioned against the peripheral rib 26 of the bobbinucaseucarrierwith ,aworking or bearing 'fitand the racewayxdeof movement of themember 2| inorder', to en: large the transverse dimension of: theraceway is sufficient to ,allow, anyyfclogging thread toesoapefromtheraceway but isnot so great as to render themechanisminoperative; -Consequently, should theoperatori forget toscrewjthe nut 35 back to its most left hand position after it has beenbacked off; the loop takerisstill operative although perhaps its,operation would benoisy;

It will benotedthat; the outer or open end of] the member 2| is inclinedor tapered-and that the, peripheralt-ribkli on the bobbin case carrieris complemental-, and this"arrangement iszemployed since ,it;facilitates the disengage;-

mentzof clogging threads'from the racewayas when the member :21 isbacked off, the peripheral rib126can be positioned out, ofcontact withany wall portionof the raceway.- H

In Figs. 7 and 8 the loop takerashown therein is identical inconstruction with the-loop taker previously, referred to, exception thetransverse configuration of the raceway in the bodyand of the peripheralrib on thebobbincase carrier. Consequently, the, same reference numeralsl are employed onthese two figures as in the previous fined by theflange-20 and the inclined open end 0! the member 2| has its normal.workingtransverse dimension; When this condition exists the rib 26 and:the 'racewayfcanj rotate'lrelative. to

-each gotherqwith a, working fit such thatucthe 9 bobbin case scarrierdoes not'hai/e lateral move- -ment relative to the body when the saidbody isjvrotating. H In the event of clogging i. e., threads 'workingfinto theraoeway; theloperator merely backs Off; :the nut 35 z to: 1relieve; the 1 pressure on the 'pins 34 and the cup-shaped member2|,xwith the result thatz'said member is free to move toward the rightasviewediin the drawings to enwlarge or expand theltransverse'dimension: of the escape from the; enlarged or expanded :raceway.

;Whenthe;raceway has beenrfreed of such threads the nut 35 i can againbescrewed to itsimost restored to "left hand position andr the partsnormal operating condition. 1. It will have been-seen that in order tofree .the racewayyofi the cloggin jt threads the operator merelyperforms the, simple operation of ;backing off thenut 35 andthatfsuchioperation doesnot require any toolsor' any particular:aptitude on1the:partiof .theioperaton;1.L

It should also be observed that the amp i 1 figures to indicatetheoorresponding parts The outerytor mopen gend 24a) of the wmember 1 2I, as shown in Figs; 7 and 8, insteadof being inclined is straight,while the peripheral; rih 26a of the bobbin case carrier is rectangularin cross sec tion. @It willbenoted, that Fig. '7 showsthe adjusting nutscrewed to its most left hand position and the-member 2|.yheld in itsmost :left hand; position to rprovide the normal working transversedimensionion, the raceway. In Fig. fi thenut 35 has been backed oflvtoexpander enlarge the transverse dime'nsion ofhthe racerway when it isdesired-to free the same o'i fclog s n thr I n w In place yotutilizingmanually operated means for expanding or contracting the raceway in thebody, power operated means maybe. employed for this purpose. An exampleof one form of such fpower, operated'rneansf is shown inFig s 9 10' by"way ,of illustration and will now be described, litbeing understood,howeyerg th at the arrangement for expanding or contracting theraceway'i power rnay take Various other forms. V

(The body, bobbin case carrier and bobbinfcase shown in Fig. 9areingeneral identical with the corresponding parts ofthelooptakefshownin Figs. 1 to ,6 inclusive and accordingly the 7 sameiisible to designate these parts. w

,A portion of "the sewing machine "bed plate is reference characters areutilizedfla's far as" posindicatedinsection at 31in Figs. 9 and IO and asupport 38 projects downwardly from the underside of the bed plateandforms a front bearing for the horizontal drive shaft later to'liereferred to that is connected to'the loop :taker. Thedisk' I I "ofthe body'of the loop taker lepro- "vided with aihub portion lZathat is"secureci to the left handend of the' horizontal drive shaft 39. f Thisdrive shaft 39,.is rotatably supported *ina suitable bearinglformed inthe supportz38 and in other suitable bearings not shown The shaft 39, isconnectedrwith and driven bykuthe operating mechanismof the sewingmachine, which mechanism, initurm'may be drivenlby an "electricmotorwlfl," indicated? diagrammatically in Fig. 10: 'I'heoperatingmechanism, the connection between it and the shaft39 endthe mo- -tor 48andthe other elements of the sewing maone n which may time have not beensnovm as tbey a e wen shaft 3! is provided with a bore d6extendingziriwar dly oi' the haft from t he ie'ithand end thereof, is"deariytsnown Fig. 9',-'wl ii le a rod t l is siidabl-y mounted said boreend cdntaetstat it's ieithand end the cup-shaped iii'tl i' shaft 39."The p'in 43 also passes through I winseen that when thea'ririatdre k2moves r'idwis rjeiativet'o' the'sha-ft 39 the push rod 41 and the boreN; v.

eiectromagnet is-seeureato the underside "or the bed plate 31 by meansor a braieke't- 4-5 which is attached tot-he pole' pie'oe ts ofth'eledtiom'agriet. Thepoiepiece 46 is shown in will correspondifigly iiidverelative to "said shaft th s instance as being siibstanti i1v u-shaped 1with its le s" extender. hor izontany above and below" the snart 39- y vd beyond the same as clearly shown in Fig.19. The pole piece 46 or "the-eieet roinaghet earries'the iisoa'i fieid winde edhn'dte'dWitiianylsuitable source of electrical nergy; ieiera iy thefield'fliiidiiig 4's or the'eieetromagnet is coniic'ted by the leads 50"and" '51' to oor duits 52 and t3 forming the electri endiiitfpr the drivin 7 iiidtor'fl of the sewing "machine previously ifeiiedto, in suchmaneery that the electro- "riiag'i'i'et is energized and deeiiergi'ze'dsimultaneei s'iywitht iosing and opening of the main control switch 54for said diiviiig' motor. That is to say, the ele ctroma gnet,,woi1ld beener- ;g'izdfwheii the sewing" iiiachirie is operating, and deenergizedinstantly that t e o erationb the machine ceases.

It iiiillb'e seen that the 'eleetroinagnet is energized the armature isattracted by the legs 41 ofjthe pole piece) and henc'e, i's, dis-"placed leflt'altit e lid the Sl'itft 39, toward (the left with aresultant displacement toward the left of the ush; rod 4 1,. Thisisplacement of the armature \42 and pi sh rod H toward. the left movesthemember 2|. towardthe left until, the 23fthereof contacts the internalshoulder 22 {oi-the ring liq-At this-'time thetouteror Open end 24 ofthe member '21 has .arunning fitv with the peripheral rib 26 9i the 'bobbin case carrier I :25;- That is to say,- the raceway :in the body" ofthe loop taker forrthe rib 26 has its normal working transversedimension; 1 1 1 'It would be well topoint out at this time that theparts are so sized that'the limits of the displacement movement towardthe left as determined by "the engagement-of the rib 23 withthe shoulder22 never brings the armature42 into :contact with'the legsflbf the polepiece 46, and 'fc'onsequentlyno rubbing action between the armature andthe legs ofr'the'po'le piece everv takes place. i

When the elec troinagnet "is. :deenergized the thrust on the push rod 41terminates, and hence theihember, 2l'is free to be displaced toward theright, asviewed in the. drawings, to enlarge or expand the transversedimension of the raceway in "the body for the.- pei' ipheralrib 26 :andallow --the escape of aiiythreadsvwhich imayhave got armature-42aiidpassin'g -tlifioug h'diametrically ten into-said raeewayar e"dsedeiogeing of tiie In Fig, 4 these is diagrammatica yillustrated themanner in which the loop seizing beak 18; of the iooptaker" picks up theioo'p'L oi the u per of needle thread, If L is correctly ior'med itheloop taker will. carry the loop properly around the bobbin ease. I T011the other hand, if a slack lode-is fanned-through impro ermanipiilation,or if looseithreads accuimilatein the vicinity of the loop taker, isuchsla ck loop or ioose threads'are liable tobe piekednp by'the ioopseizing beak 18-: be drawn between the raeewayand the bearing rib 218 onthe bobbin ease carrier resulting in clogging.

A rotary looptalker' embodying the present-invention enablesrthe slacklooniloose 'threads' or width or said raceway. "4'0othermobstructionflcausing the clogging to be readiiy cleared from'theraceway a I T The "clearing of the-raceway "does'not r quire-.thetdisass"embhng orf the loop taker; any particw lar .skili' or *kriowledgewonthe'bart 'ofthe operator, or the use ofxtooisforrsuchrpurpose.

It 'shou ld' beunders'tood that the presentinvehtionismotto be limitedto the-specific embo'diinentl thereof illustrated herein merely asexamples, but that the-invention is susceptible of an variationsan'dadaptations withinthe'scope (if the appended claims.

Having thus described my invention; 1' claim:

1. A rotary loop' taker fora sewing machine tomprising a relativelyrotatable e up shaped :body' andbobbin ease carrier therein, said bodyand; carrier being provided with a; cooperating raceway and bearing-rib,82nd n'ieans operativeiy associated with said body remotely from theopen end thereof and extending into :the hollow interiorr of vthebo'dy'foi' positively adjusting the 2. :A rotary loop taker for sewingmachine comprising a. relatively. rotatable cup-shaped body and bobbincase carrier therein, said body and carrier having aicooperating racewayand rbearirig rib, and positive means operanvely 'as .isd'ciatedwithisaid hody'ior maintaining the normal working" width of said racewayorvfor ena' blin'gthe Width thereof to be enlarged and ineluding a partlocated within the hollow'interior 3. TA rotary loop takeriorwa sewingmachine :comprising a; "relatively vrotatable cup-shaped body and bobbinease carrier therein,"said body and carrier havinga cooperating racewayand bearing rib, "and. means :for positively maintain- "irigithesnor'mal working width .of said raceway :or for enabling thewidththereo'f tobe enlarged ."and including a movable-part extendingintothe li'ollow interior oi said body and a movable ele- -nientoperatively associated'with'said body and part, and having a-portiondefining a side Wall of said raceway. I i K 4. A rotary floop :takerfora sewing machine i omprising af relatively rotatable cup-shaped 'bodyandbobbin caseicarrirtherein, said body.

and carrier having, a cooperating 'raoevvay and bearing rib;and"means"iorfmaintaining the normal working widthi-of said raceway'ior"for enabling thewidth t'hereof to be enlarged and "indluding a movableelementpperativdy asso- -ciated" with said body andhaving a p'ortio'nderfiningaxside Wall of said raoeway,"andmeans for positivelymovingsai'd element and operable from the-exterior of said bodyiand.includingia movable gagt extendin'giintoythe hollow interior of said:oy. j a I a A rotary loop taker for a sewing machine comprising arelatively rotatable cup-shaped body and bobbin case carrier' therein;said and it carrier having a cooperating raceway and bearing rib,amovableelementoperatively assofining the innerside wall of saidraceway, "a'

movable member supportedby said body and engaging said elenientto movetheilatter to vary the width of said ra-cway',"and means for movme saidmembe'r i u a P7. A rotary loop taker-"for a 1 sewing machine comprisingarelatively rotatable body and bobbin case carriergsaid bodyand carrierhaving a cooperatingrac'eway'and'bearing rib, a slidable elementoperatively associated with saidbody and having ajp'ortion defining aside wall of'said raceway; a movable member supported by said bodya'ndengaging said element, and means operatively associated with said bodyfor positively movingsaid member to move said element and 'vary thewidth of said raceway.

8. A rotarylooptaker iora sewing machine comprisingarelatively-rotatable body and bob bin case carrier; said'body andcarrier having a c'oopratingraceway and bearing-rib, a mova'bl'elementoperatively associated with s'aid body and having aportion defining aside wall of said raceway, a "slidable member supported-by said body andengaging said element, and manually operated means operativelyassociated with said body for positively moving-said member to move saidelement to vary'the-width of said raceway.

9. A rotary loop taker fora sewing machine comprising 'a relativelyrotatablebody and bobbin case carrier, said body-and carrier having acooperating" raceway an'd bearing rib, a movable element bperativelyassociated with said body and having a portion defining a side wallofsaid raceway, a movable member supported by s'aid bodyandengageable-with said element, and adiustable means acting on;'said'member tomove the latter positively and,- in' turn', move saidelementto vary thewidthof said raceway.

10. A rotary loopitaker for a; sewingmachine comprising a relativelyrotatable body and bobbin case carrier, said body and' carrier havingacooperating: raceway rand bearing rib," a movable element operativelyassociatedwithsaid bodyand having a portion-defininga side wall of saidraceway, a movable member supported-by said body and engageable withsaidelementgand means for moving saidmember'to move said element-to varythe width of said raceway and including a threaded portionon said bodyand, a nut cooperating therewith andengageable with said member, I 1am", A1. 11; A rotaryi loop takerior a sewing machine comprising arelativelyrotatable body and bob binwcase carrier, said body and carrierhaving a cooperating raceway and bearing" rib, a movable elementoperatively associated with said body andhaving a portion defining aside wallof-said raceway, a movable member-:oyierativelylassdcarriermounted in said body and provided "with ciated with said body:anduengageable' with said element, and power" operated means for" movingsaid member to move said element to vary the width of said raceway. a lq l v 12. A rotaryloop taker fora'sewingimachine comprising a relativelyrotatable-body and bobbin case carrier,- said body" and carrier having acooperating-raceway and bearing rib, a movable element operatively"associated with said body and having a -portion' defining' a side-wallofsaid raceway} a movable member operatively associated with l said bodyand enga'geable with said element, and electrically actuatedmeans formoving said memberto niove said element and vary the width of saidraceway. i 13. A rotarydoop taker for a" sewing =machinc comprising arotatable body and a bobbin case a circiimferentially extending "bearing"ri movable element mour'ite'df in 'said body, aid body and said elementhaving *cooperating portions forming the side walls of a rac'eway forsaid rib a movabl' membi fsdpported in' said may and engaging saidelement, and means operatively associated withsai'd body for positivelymoving said member to move saidcelement andvary the widthoffs'aid reway; L I i i, A rotary loop taker tor a' sevimg machine comprising arotatable body, 'a bobbin case carrier mounted therein 1 and providedwith a circumferentially extending bearing rib'jfa' movable elementhoused in said body, said body and said element having cooperatingportions forming the' side wallsof a raceway forfsaid a slidable L pinsupported'by said body and engagingwith said, element, and means formoving said pin to move said element and vai y the width ofsaid raceway.

15.'A rotary a comprising a rotatable body, a-bobbin case carriermounted therein iand provided with acircumferentially extending bearingrib, a mov able element housed in said body, said bodyand said elementhaving" cooperating; portions form: ing the side Wallgbf a raceway forsaid rib, a slidable pin supported said body-and engaging with; saidelement, and power op'erated' means for moving said pin tomove saidelementand Am e-Wee k n fl i gma hi comprising a rotatable substantiallycup-shaped body having an axiallydisposed external'hub a portion, asubstantially cup-shaped movableelement nested in {said body-,jsaid bodyand said element having cooperating portions forming a raceway, abobbinfcasefcarriermounted insaid body.and provided with acircumferentially' extending rib engagingin said raceway a plurality of'jcircumferentially spacedslidable pins project in through the base of'saidcup shaDed body and engaging the base of; said cup' shaped element,and means carried by said hub portion of said body and" engaging saidpin's and adjustable axially ofsaid body tomove said pinsfandsaidelement to vary the-widthof said raceway. l

17. A rotary loop talg'en for a sewingmacl' ine comprising a rotatablesubstantially cup-shaped body having an axially disposed} eXternalhubportion, a substantially cup-shaped movable element nested in said body,said body and said element havingcooperating portions forming a raceway,a bobbin case carrier mounted in said body and provided with acircumferentiallyex tending 'rib engaging in said 'ra'ce'way a pluralityof circumferentially spaced slidable' pins projeca loop taker for asewing lmachi i aid b dyjhayih amma wea xte d said shaft'and engaging smoi/able elem nt};

d an ide menw ro a 1 0 a eraro a wine ma -blaze '9 -pr sin a r ati eamiata e oclr d b b bin as v arrie d=5.bod and c r e vin a pop ra ine raw d..h r ns r amo e e e t ope at ve 1 ,a soe t v it aid-1 body andhaving a por ti on definingaside wall or said race a a mova e f emb e ali' as o at d th d'body nd e g i s d el nt a d eans o na id m mb r w mve a d element to vary the width of said racewayand i e ding e c mma eiq vi n, n o

- '19- A rotar 100p taker or w v n aeh 'ne q m ris a t air ta ableubs.antral-1 up-s ar d bpd ,hav n a axially L-di p d fe ma kl-l n r iqnia ubs ant al uphar o m rab ke er raceway, a bobbin ease carrier housedin said body endr oyided; w th arerirh r l b in rib e gaging in saidraoeway, an operating shaft for and secure t saidfinub and. nwmmu i e e3Q j N g said body, a rod s'lidablevin said hollow port on a": saidshaft and engaging vK m le men z am mea s r rt s d ro n m vegsa d e mentan varrthe i t of .said raceway 2O. rotary 1001b taker Tfo'r asewingrn'ach'ine comprising a rotatahle slibstantia'lly cup-shaped bodyhai ingan axially disposed external hu'b'po'rtion, a. substantiallycup-shaped movable element nested in said Bo y, said body I,d.saide1frnent having coo erati g pom a s Yd a raceway, abobb'in eas-barr er housed in. said'body'and provided vsii't'h 'ae'r'ipgierarbearmg rib engaging an operating shaft forQs'a'id 'Y- r --V4d said bod a (fo d slidable-i'nlisaidhollow p rtion o .21. rotary ritcom is g 13; a portion, a silhstan a1 ne'sted f I interior or said body,"f e sud-awe in said hdllowportionoif said 'shattand 'ngagin'g saidfmovgable element, and "hieansffor m vmg sa'idirod to i i YYeT d l i ie ifa'i ar fi W h o said nd i nclnding anfelectrornagnetic -device eratiye'qdnneotion between said-deviee 2- A 'rrlqb flak ore sew ine jom f ine a-'ro a 'ames bs an 1y -sh e bod il a ae;"an;exte v-nalv axia r di posedhub go t fon an ope atin ishaiteforfsaid body andihavn a, hol ow prtionextendingsinj and-secured to s idxhub porti n and mmun a q l w th t'-jnterior of saidbo'dy. a mom-bi e substantiallyoups a ed-element estedsaid bo y; sa body and aid elementay n cooperatin orti s efiningyaraceway a hobbin'case, q r ien oun ed insaid body andnmrided w bhima eipheral rib en aging, insaidraoeway, a slidable rod mounted n aid hollowportion oiaid shait and en a in sa d m th 0W; po i n-o said shaft: beiprovided i. l .7 posed axially elongated sl ts 'angflectr fi e tembracin said h llowortioorot ga s a n armature 'sl dable on saidho qw pion, :s d shaft, and. means carried by.; aid;ar at r en extendin th o h,if g and said ro wh r b mov m t of' a d armaturemove 2 3 11 rod-{andshi bs ai ment o; 1 w dth -of ,s a racewayl; i v; 1 1:: I 1 w A ta rlq pak r. er a sewin ma hine compr sin azro a a le sub taatial puphaped odyh in a x e 1 ax y. ispas hub portion, an operating shaft forrisaid body.and

liar-idea h l ow p t n e e d n wan e ur to. said hub portion and in.:eomm ic omwith the interior-o aid b dyga m vab e sub t a ly apedelement nested-in saidbqdy, saidhody an said, ement ria eoo e a in r rqm F187 fin ea ewayhabobbica eea i m nted ins-a d. bod a d ma -idea,hnaf erirhe lrib en a i :i-nsaidr e ayl id bler mo rne in.saidho lpwpo to i a dj laa fia n i s id ab e lement/th l o -r ma d sa shaft beingprovided diametriqally-opposed axia lye oneate 5 1 5 n1e1e o snetbra ingsaid hol low ortion of 'saidshait, an anna: are 's i a leuon {Said hlioweo i nof. l- S aft, and m n r i dJo v 'a mabu andnd in xt o eh aslots: d sa dod; :wh neby movementof :said ar ture moves said rod andshi t s i el men to rer h .w-i 1 ai acew y; a bo a a d sa d element havio0: o at mgr-ma smit n orem mz sai em t elat e, o eam f ed w i sa a ma:ti -re is so oe be mha f :ne e Qn ae she a e, p wfis o said net- .7 o .o

A r 1 0 -1? a r: or a s in -ma ne c m riemea ela i elyro atab eh dy dibin oas o e rsa d rb y andwc ri rjha ae qner in v ace yndrbean eih 1rnevab1e-,e1e-

merit operatively assogaiated with said -body and hayingazpor-tiondefinmgaside-wall ofsaid race- Way, ammovable member n iv y: assb iawith said body and; engaging said element, and means for moving @saidmember to meve element to; wiry-the width of said raceway and includingan electromagnetic :device having pole pieces and an, armatureoperatively :connected w th id member; saidwarmaturexbemg so dis posedrelative to :said;spdle.. pieces that itu neyer centaotsjthedatter. o kv combination sina sewihgimaohine, operating;meensiiorthesewingrmachinemechanism including a rotary-loop taker;vsaidavioopnmaker comprising-a;-relativelyrrotatablebodyiandrbohbincasec'arrier, said body-and carrierzhaving a 00-. operatin -renewed andbearing 11b,. and means for maintaining sthe normal: working "width 10fsaid raceway or for enabling the width thereof to be enlarged; and*operative.aconnectionsihstweensaid iast last, means functions,tovmaintain: the normal or W dth 'oflsaidvrsmeway "only when .tthe

means "and saict operatingameansn n lu qflfipetafiing elements suchthatasai'd' 26. In combination in a sewing machine, a main drivingelectric motor, an electrical circuit for energizing and deenergizingsaid motor and including a switch, a rotary loop taker comprising arelatively rotatable body and bobbin case carrier, said body and carrierhaving a cooperating raceway and bearing rib, and means for varya ingthe width of said raceway including a movable element operativelyassociated with said body and having a portion defining a side wall ofsaid raceway; means for moving said element and including anelectrically operated device, and means electrically connecting saiddevice and said circuit intermediate said motor and said switch wherebysaiddevice is energized or deenergized simultaneously with theenergization or deener gization of said motor.

27. A rotary loop taker for a sewing machine comprising a body and abobbin case carrier relatively rotatable within said body, said body andI adjacentthe closed end of said body for positively moving said elementand adjusting the carrier being provided with a cooperating bearing riband raceway therefor having its inner side wall movable, and meansoperatively associated with the loop taker for positively moving saidinner side wall to positively maintain the normal working width of saidraceway or to enable thevwidththereof to be enlarged.

28. A rotary loop taker for a sewing machine comprising a relativelyrotatable cup-shaped body and bobbin case carrier mounted therein, saidbody and carrier being, provided with a cooperating racewayand bearingrib, said raceway being formed in part by a movable element, and meansoperatively associated with said body and element and including a singleoperating member width of said raceway.

CHARLES E. COLEGROVE.

